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http://dx.doi.org/10.5000/EESK.2015.19.3.133

Analyses of Vertical Seismic Responses of Seismically Isolated Nuclear Power Plant Structures Supported by Lead Rubber Bearings  

Cho, Sung Gook (R&D Center, Innose Tech Co. Ltd.)
Yun, Sung Min (R&D Center, Innose Tech Co. Ltd.)
Kim, Dookie (Department of Civil Engineering, Kunsan National Univ.)
Hoo, Kee Jeung (School of Civil & Environmental Eng., Kookmin Univ.)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.19, no.3, 2015 , pp. 133-143 More about this Journal
Abstract
It is very important to assure the seismic performance of equipment as well as building structures in seismic design of nuclear power plant(NPP). Seismically isolated structures may be reviewed mainly on the horizontal seismic responses. Considering the equipment installed in the NPP, the vertical earthquake responses of the structure also should be reviewed. This study has investigated the vertical seismic demand of seismically isolated structure by lead rubber bearings(LRBs). For the numerical evaluation of seismic demand of the base isolated NPP, the Korean standard nuclear power plant (APR1400) is modeled as 4 different models, which are supported by LRBs to have 4 different horizontal target periods. Two real earthquake records and artificially generated input motions have been used as inputs for earthquake analyses. For the study, the vertical floor response spectra(FRS) were generated at the major points of the structure. As a results, the vertical seismic responses of horizontally isolated structure have largely increased due to flexibility of elastomeric isolator. The vertical stiffness of the bearings are more carefully considered in the seismic design of the base-isolated NPPs which have the various equipment inside.
Keywords
Equipment; Seismically isolated; Vertical seismic response; Lead rubber bearing; Floor seismic demand; Vertical stiffness;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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